Charles e



' (No Model.)

G.E.HENNIE&

LOOK. v No. 427,865. Patented May 13, 1890.

WITNESSES /NVENTO/-? A TTOHNE YS UNITED STATES PATENT OFFICE.

CHARLES E. l-IENNIES, OF ATLANTA, GEORGIA.

LOCK.

SPECIFICATION forming part of Letters Patent No. 427,865, dated May 13, 1890.

Application filed March 4, 1890. Serial No. 342,663. (No model.)

To all whom it may concern:

Be it known that 1, CHARLES E. HENNIEs, of Atlanta, in the county of Fulton and State of Georgia, have invented a new and useful Improvement in Locks, of which the following is a specification.

My invention relates to a lock in which it is necessary to use two keys in looking and unlocking the same, and has for its object to provide a lock which cannot be easily picked, and also one which cannot be opened with the proper keys unless manipulated in a definite manner; and with these objects in view it consists of a case having a bolt sliding therein, provided with notches in its upper and lower edges, a spring-actuated tumbler adapted to hold the said bolt in an unlocked and partially locked position, a spring-actuated stop adapted to hold the bolt in a locked position, said tumbler, stop, and bolt being so constructed that two keys are necessary to lock and unlock the same.

The invention consists, further, in the novel construction of the various parts whereby the various objects are accomplished, such as will be more fully hereinafter explained and claimed. w

In the drawings forming a part of this specification, and in which the same referencenumerals indicate the same or corresponding parts, Figure 1 is avertical longitudinal section of my improved lock, showing the position of the parts when the same is unlocked. Fig. 2 is a similar View showing the position of the parts when the first key has been manipulated and the bolt partially locked. Fig. 3 is a similar view showing the position of the parts after the second key has been manipulated, the bolt being 'thrown out its full extent and locked in such position. Fig. 4 is a perspective view of the first or right-hand key, and Fig. 5 is a perspective view of the second or left-hand key; and Fig. 6 is a plan view of the look, all the parts, including the case, being in position.

In the embodiment of my invention I employ a case 10, which consists of the baseplate 11 and inclosing-box 12, said box being secured to the base-plate by the screws or bolts 13, and in the face of said box are made two key-holes 14 and 15. Within the casing proper position and guided and limited in its movements by means of a short stud 17, rigidly secured to the base-plate 11 and working in a longitudinal slot 18, made in the bolt. In the upper edge of the bolt are cut a series of notches 19,19, and 19 for engagement with the tumbler, the notch lil being deeper than 19 and 19 deeper than 19, the purpose of which will appear further on. In the lower edge of said bolt are cut the notches 20 20, adapted to be engaged by the bits of the keys. To the rear or right of the bolt is arranged a locking stop or tumbler 21, said stop consisting of a horizontal locking member 21 and the vertical guiding and operating member 21", said vertical member being slotted longitudinally at 21, through which passes a short stud 22, adapted to guide the movements of the stop or tumbler 21 and limit the downward movement of the same. Upon the lower end of the vertical member is formed the extension 23, the inner lower end of which is rounded, as shown at 23. The upward movement of the stop 21 is limited by means of an angled flange or boss 24, rigidly secured to the base-plate, the angle of said flange or boss corresponding to the angle of the members of the stop, whereby it serves also as a guide for the said stop or' tumbler.

The bolt 16 is constructed, as usual, with a thick end portion 16, but the inner portion of the same is of athickness not greater than the stop 21. hen the bolt is thrown back or unlocked, the rear upper end of the same fits in the angle of the stop 21, and the lower end passes under the extension 23, the rear lower portion of the side of the notch 20 coinciding with the rounded end of the same, as shown in Fig. 1. When the bolt is thrown out or locked, the stop or tumbler 21 drops, the horizontal arm of the same bearing against the end of the bolt and the vertical portion of the angled flange or boss 24: prevents said stop being turned or moved. To make the stop operate positively, I employ a spring 25, said spring being fixed in a split post or stud 26, rigidlysecured to the base-plate 11 at apoint above the stop 21. To hold the bolt in its unlocked and also a partially and wholly locked position, I employ a tumbler 27, said tumbler having a spur or pin 27, adapted for engagement with the notches'in the upper edge of the bolt. The tumbler 27 is operated in said engagement by the bow-spring 28, the longer and lower member of said how being rigidly secured to the tumbler, the upper end of said spring being bound against a post or stud 26, secured to the base-plate 11, and the central or loop portion 29 of said spring is placed around the post 30. The tumbler 27 is of a width nearly equal to that of the bolt, and the lower left hand or rear end rests over the rounded end of the extension 23. At a point opposite the head of the key-hole 11 the base-plate 11 is perforated, as shown at 31, and opposite the head of the key-hole 15 an arbor 82 is rigidly secured to the said plate and adapted to engage the barrel of the key 33, the perforation being adapted for engagement with the pintle of the key 34.

The construction of my improved lock having been described, its operation is as follows: I will suppose the bolt unlocked and it is desired to throw the same out and lock it. The right-hand key, which is the barrel-key, is inserted in the hole 15, turned to the left and then taken out or left in as desired. The left-hand key or pintle-key is then inserted in the hole 11, and also turned to the left, and the bolt is locked. The notch 19 being quite shallow, the tumbler 27 is held at a sufficient height to prevent the key 3&- engaging and releasin the same, but when the tumbler has dropped into the notch 19 by means of the key .it is lowered so as to be engaged by the said key 31. The pin of the tumbler E37 normally rests in the notch 19, and when the key 33 is inserted and turned to the left it first lifts the tumbler out of engagement with said notch, and as the bit of the key engages the notch 20 in the lower edge of the bolt, said bolt is moved to the left, and as the tumbler descends it engages with the second notch 19, thus holding the bolt in a partiallylocked position. The second key 34: being inserted, the tumbler is raised out of engagement with the notch 19, and by this time the notch 20 has also been engaged by the bit of the key and the bolt moved to the left. The bolt having passed beyond the end of the horizontal arm of the stop 21, said stop immediately descends to the rear or right of the bolt and holds the same locked, the angled boss 24: preventing any turning or movement of the stop 21, and the tumbler 27 is also in engagement with the notch 19*, so that the bolt is doubly secured.

To unlock my improved lock, the key 33 is first inserted and given the first half of a turn to the left. The bit now engages the extension 23 on the end of the stop 21 and raises the same, so that the horizontal member is above the upper edge of the bolt. The key has now reached the lower end of the tumbler 27 and is then stopped. lVhile the key 33 is held in this position, thekey is inserted in the hole 11: and turned to the right, first lifting the tumbler out of the notch 19 and then moving the bolt back, so that the end of the same passes under the horizontal member of the stop, the tumbler by this time has engaged the notch 19, and the bolt is carried back until its rear or right-hand end rests against the vertical member of the stop, the lower end passing beneath the extension 23, and the tumbler by this time has fallen into engagement with the notch 19, when thebolt is unlocked and held so.

From the above description it will be seen that I provide a lock which cannot be picked, one in which it is necessary to employ two keys, both in locking and unlocking, and one in which, when the proper keys are to behad, it is necessary to manipulate them in definite manner, in order to operate the parts of the lock.

Having thus described the construction, oporation, and advantages of my improved dcvice, what I claim asnew, and desire to secure by Letters Patent, is-

1. In a lock of the character described, the combination, with a case provided with two key-holes upon the same side, of a bolt sliding therein, provided with notches on its under side, and aspring aetuated stop arranged to the rear of the bolt, adapted to lock the same in a locked position, substantially as shown and described.

2. In a lock, the combination, with a case provided with two key-holes upon the same side, of a bolt sliding in said case, said bolt being notched on its upper and lower edges, a spring-actuated tumbler adapted for en gagement with the upper notches, and a spring actuated. stop arranged at the rear of the bolt, adapted to drop behind the same and hold it locked, substantially as shown and described.

3. In a lock, the combination, with a case provided with two key-holes, of abolt sliding therein, said bolt being notched on its up per and lower edges, a spring-actuated tumbler adapted for engagement with the notches on the upper edge, each notch to the rear bein g dee per than the ad jacentforward one, and a spring-actuated stop arranged at the rear of the bolt and carrying an extension on its lower end adapted to be engaged by the key, substantially as and for the purposes set forth.

4. In a lock, the combination, with a case constructed as described, of a bolt sliding therein, said bolt being notched on the upper and lower edges, a spring-actuated tumbler adapted to engage the notches in the upper edge, each notch to the rear being deeper than the adjacent forward one, for the purpose described, a spring-actuated stop an ran gcd at the rear of the bolt, said step con.- sisting of a horizontal arm adapted to drop behind the bolt and hold it locked, and a vertical slotted arm adapted for engagement and 2O" in its lower edge, a spring-actuated tumbler adapted for engagement with the notches in the upper edge, and a spring-actuated stop arranged at the rear of the bolt, and consisting of a horizontal member and vertical slotted member carrying an extension at its lower end adapted for engagement with the key, the lower rear end of the tumbler resting over the lower forward end of said extension,

as and for the purpose set forth.

6. In a lock, the co1nbination,with the case constructed as described, of a bolt sliding therein, said bolt having the notches 19, 19

and 19 in its upper edge and the notches 20 and 20 in its lower edge, adapted to be e11- gaged by the keys, a spring-actuated tumbler adapted for engagement with the notches in the upper edge, a stop arranged at the rear of the bolt, said stop consisting of a horizontal member adapted to be sprung behind the bolt, and a vertical slotted member having an extension on its lower end adapted for engagement with the key, and the angled flange or boss 24, arranged above the stop to guide and hold the same andlimit its upward movement, substantially as shown and described.

CHARLES E. HENNIES. Witnesses:

M. C. MORRIS, L, W. BROWN, W. P. J. OoYr. 

